Camera lens

Abstract

The application discloses a camera lens, which comprises a lens barrel, a five-piece lens group and a positioning element group arranged in the lens barrel. The five-piece lens group comprises a first lens, a second lens, a third lens, a fourth lens and a fifth lens arranged in sequence from the object side to the image side along the optical axis. The fifth lens has a negative focal power, and the distance from the image side surface of the fifth lens to the imaging surface of the camera lens gradually decreases first and then gradually increases in the direction perpendicular to and away from the optical axis. The positioning element group comprises a fourth positioning element and a fifth positioning element. The fourth positioning element is arranged on the image side surface of the fourth lens and in contact with the image side surface of the fourth lens. The fifth positioning element is arranged on the image side surface of the fifth lens and in contact with the image side surface of the fifth lens. The effective focal length f5 of the fifth lens, the central thickness CT5 of the fifth lens on the optical axis and the interval EP45 of the fourth positioning element and the fifth positioning element along the optical axis satisfy the following condition: -30.0 < f5 / (EP45-CT5) ≤ -5.0.

Description

Technical Field

[0001] This application relates to the field of optical devices, specifically to a five-element camera lens. Background Technology

[0002] With the rapid development of portable electronic products such as smartphones, the imaging requirements for camera lenses in these products are becoming increasingly stringent. For example, high imaging quality is achieved through optical design of the camera lens.

[0003] For five-element camera lenses, the last lens is relatively sensitive, and the rationality of this lens and the positioning elements at its position is often overlooked in the actual design process. This will result in poor coma performance and assembly stability of the camera lens, which will seriously affect the imaging quality of the camera lens. Summary of the Invention

[0004] This application provides a camera lens that can at least solve or partially solve at least one problem or other problems existing in the prior art.

[0005] One aspect of this application provides a camera lens comprising a lens barrel and a five-element lens group and a positioning element group disposed within the lens barrel. The five-element lens group includes a first lens, a second lens, a third lens, a fourth lens, and a fifth lens arranged sequentially along the optical axis from the object side to the image side. The fifth lens has negative optical power, and the distance from its image-side surface to the imaging plane of the camera lens gradually decreases and then gradually increases in a direction perpendicular to and away from the optical axis. The positioning element group includes a fourth positioning element and a fifth positioning element. The fourth positioning element is disposed on and in contact with the image-side surface of the fourth lens, and the fifth positioning element is disposed on and in contact with the image-side surface of the fifth lens. The effective focal length f5 of the fifth lens, the center thickness CT5 of the fifth lens along the optical axis, and the distance EP45 between the fourth and fifth positioning elements along the optical axis satisfy -30.0. <f5 / (EP45-CT5)≤-5.0。

[0006] According to an exemplary embodiment of this application, the center thickness CT5 of the fifth lens on the optical axis, the spacing EP45 between the fourth and fifth positioning elements along the optical axis, the inner diameter d4s of the object side of the fourth positioning element and the inner diameter d5m of the image side of the fifth positioning element satisfy: 1.5≤(EP45 / CT5)×(d5m / d4s)<6.5.

[0007] According to an exemplary embodiment of this application, the radius of curvature R9 of the object-side surface of the fifth lens, the radius of curvature R10 of the image-side surface of the fifth lens, the inner diameter d4s of the object-side surface of the fourth positioning element, and the inner diameter d5s of the object-side surface of the fifth positioning element satisfy: 0.5 <d4s / R9+d5s / R10<8.5。

[0008] According to an exemplary embodiment of this application, the positioning element group further includes a third positioning element disposed on and in contact with the image-side surface of the third lens, wherein the radius of curvature R8 of the image-side surface of the fourth lens, the center thickness CT4 of the fourth lens on the optical axis, the air gap T34 between the third and fourth lenses on the optical axis, and the distance EP34 between the third and fourth positioning elements along the optical axis satisfy: -40.0 <R8 / (T34+CT4-EP34)<-3.5。

[0009] According to an exemplary embodiment of this application, the effective focal length f4 of the fourth lens, the effective focal length f5 of the fifth lens, the spacing EP34 between the third and fourth positioning elements along the optical axis, the maximum thickness CP4 of the fourth positioning element, and the spacing EP45 between the fourth and fifth positioning elements along the optical axis satisfy: 1.0≤(f4+f5) / (EP34+CP4+EP45)≤2.0.

[0010] According to an exemplary embodiment of this application, the aperture number Fno of the camera lens, the inner diameter d3s of the object side of the third positioning element, the inner diameter d3m of the image side of the third positioning element, and the outer diameter D3m of the image side of the third positioning element satisfy: 0.5 <Fno×((D3m-d3m) / d3s)≤3.0。

[0011] According to an exemplary embodiment of this application, the positioning element group further includes a first positioning element and a second positioning element. The first positioning element is positioned on and in contact with the image-side surface of the first lens, and the second positioning element is positioned on and in contact with the image-side surface of the second lens. The effective focal length f2 of the second lens, the air gap T23 between the second and third lenses on the optical axis, the distance EP12 between the first and second positioning elements along the optical axis, and the maximum thickness CP2 of the second positioning element satisfy: -150.0. <f2 / (EP12+CP2-T23)<-40.0。

[0012] According to an exemplary embodiment of this application, the refractive index N1 of the first lens, the radius of curvature R1 of the object-side surface of the first lens, the radius of curvature R2 of the image-side surface of the first lens, and the inner diameter d1s of the object-side surface of the first positioning element satisfy: 2.0 <N1×(R2-R1) / d1s<3.5。

[0013] According to an exemplary embodiment of the present application, the entrance pupil diameter EPD of the camera lens, the outer diameter D0s of the object-side end face of the lens barrel, and the inner diameter d1s of the object-side face of the first positioning element satisfy: 1.0 < (D0s - d1s) / EPD < 3.0.

[0014] According to an exemplary embodiment of the present application, the effective focal length f1 of the first lens, the inner diameter d1s of the object-side face of the first positioning element, and the outer diameter D1s of the object-side face of the first positioning element satisfy: 1.0 ≤ f1 / (D1s - d1s) ≤ 5.0.

[0015] According to an exemplary embodiment of the present application, the on-axis distance Td from the object-side face of the first lens to the image-side face of the fifth lens, the inner diameter d0m of the image-side end face of the lens barrel, the inner diameter d1s of the object-side face of the first positioning element, and the interval EP01 along the optical axis between the object-side end face of the lens barrel and the first positioning element satisfy: 1.5 ≤ (d0m - d1s) / (Td - EP01) < 2.5.

[0016] According to an exemplary embodiment of the present application, the total effective focal length f of the camera lens, the on-axis distance Td from the object-side face of the first lens to the image-side face of the fifth lens, and the inner diameter d0m of the image-side end face of the lens barrel satisfy: 1.3 < f × (Td / d0m) ≤ 2.0.

[0017] According to an exemplary embodiment of the present application, the positioning element group further includes a first positioning element, a second positioning element, and a third positioning element. The first positioning element is placed on the image-side face of the first lens and contacts the image-side face of the first lens. The second positioning element is placed on the image-side face of the second lens and contacts the image-side face of the second lens. The third positioning element is placed on the image-side face of the third lens and contacts the image-side face of the third lens. Among them, the camera lens further satisfies: 0 < R2i / dis < 11, where i = 1, 2, 3, or 5. When i = 1, R2i represents the curvature radius of the image-side face of the first lens, and dis represents the inner diameter of the object-side face of the first positioning element. When i = 2, R2i represents the curvature radius of the image-side face of the second lens, and dis represents the inner diameter of the object-side face of the second positioning element. When i = 3, R2i represents the curvature radius of the image-side face of the third lens, and dis represents the inner diameter of the object-side face of the third positioning element. When i = 5, R2i represents the curvature radius of the image-side face of the fifth lens, and dis represents the inner diameter of the object-side face of the fifth positioning element.

[0018] According to an exemplary embodiment of the present application, the first lens and the fourth lens have positive optical power, and the second lens has negative optical power.

[0019] According to an exemplary embodiment of this application, the camera lens also satisfies: |f3|>|fn|, |f2|>|fn|, n=1, 4 or 5, where f2 is the effective focal length of the second lens, f3 is the effective focal length of the third lens, and fn is the effective focal length of the nth lens.

[0020] This application, by controlling the effective focal length of the fifth lens and the center thickness of the fifth lens on the optical axis, and simultaneously controlling the spacing between the fourth and fifth positioning elements along the optical axis, can maximize the adjustment of the peak value of the field of view and the field curvature of the outer field of view, effectively control the aberrations of the front optical lens of the camera lens, so that the camera lens has good coma performance, and while ensuring that the camera lens meets the aberration design, it can also improve the assembly stability and imaging quality of the camera lens. Attached Figure Description

[0021] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0022] Figure 1 A schematic diagram showing the parameters of a camera lens according to this application is provided;

[0023] Figure 2 A schematic diagram of the structure of a five-element lens group of a camera lens according to a first embodiment of this application is shown;

[0024] Figure 3 A schematic diagram of the camera lens according to Embodiment 1 of the first embodiment of this application is shown;

[0025] Figure 4 A schematic diagram of the camera lens according to Embodiment 2 of the first embodiment of this application is shown;

[0026] Figure 5 A schematic diagram of the camera lens according to Embodiment 3 of the first embodiment of this application is shown;

[0027] Figures 6A to 6D The on-axis chromatic aberration curve, astigmatism curve, distortion curve, and magnification chromatic aberration curve of the camera lens according to the first embodiment of this application are shown respectively.

[0028] Figure 7 A schematic diagram of the structure of a five-element lens group of a camera lens according to a second embodiment of this application is shown;

[0029] Figure 8 A schematic diagram of the camera lens according to Embodiment 1 of the second embodiment of this application is shown;

[0030] Figure 9A schematic diagram of the camera lens according to Embodiment 2 of the second embodiment of this application is shown;

[0031] Figure 10 A schematic diagram of the camera lens according to Embodiment 3 of the second embodiment of this application is shown;

[0032] Figures 11A to 11D The on-axis chromatic aberration curve, astigmatism curve, distortion curve, and magnification chromatic aberration curve of the camera lens according to the second embodiment of this application are shown respectively.

[0033] Figure 12 A schematic diagram of the structure of a five-element lens group of a camera lens according to a third embodiment of this application is shown;

[0034] Figure 13 A schematic diagram of the camera lens according to Embodiment 1 of the third embodiment of this application is shown;

[0035] Figure 14 A schematic diagram of the camera lens according to Embodiment 2 of the third embodiment of this application is shown;

[0036] Figure 15 A schematic diagram of the camera lens according to Embodiment 3 of the third embodiment of this application is shown;

[0037] Figures 16A to 16D The on-axis chromatic aberration curve, astigmatism curve, distortion curve, and magnification chromatic aberration curve of the camera lens according to the second embodiment of this application are shown respectively.

[0038] Figure 17 A schematic diagram of the structure of a five-element lens group of a camera lens according to the fourth embodiment of this application is shown;

[0039] Figure 18 A schematic diagram of the camera lens according to Embodiment 1 of the fourth embodiment of this application is shown;

[0040] Figure 19 A schematic diagram of the camera lens according to Embodiment 2 of the fourth embodiment of this application is shown;

[0041] Figure 20 A general schematic diagram of the camera lens according to Embodiment 3 of the fourth embodiment of this application is shown; and

[0042] Figures 21A to 21D The on-axis chromatic aberration curve, astigmatism curve, distortion curve, and magnification chromatic aberration curve of the camera lens according to the fourth embodiment of this application are shown respectively. Detailed Implementation

[0043] To better understand this application, various aspects of this application will be described in more detail with reference to the accompanying drawings. It should be understood that these detailed descriptions are merely illustrative of exemplary embodiments of this application and are not intended to limit the scope of this application in any way. Throughout the specification, the same reference numerals refer to the same elements.

[0044] It should be noted that in this specification, the terms "first," "second," "third," etc., are used only to distinguish one feature from another and do not imply any limitation on the feature.

[0045] In the accompanying drawings, the thickness, size, and shape of the lenses have been slightly exaggerated for ease of illustration. Specifically, the shapes of the spherical or aspherical surfaces shown in the drawings are illustrated by way of example. That is, the shapes of the spherical or aspherical surfaces are not limited to those shown in the drawings. The drawings are for illustrative purposes only and are not drawn strictly to scale.

[0046] In this paper, the paraxial region refers to the region near the optical axis. If the lens surface is convex and the location of the convexity is not defined, it means that the lens surface is convex at least in the paraxial region; if the lens surface is concave and the location of the concaveness is not defined, it means that the lens surface is concave at least in the paraxial region. The surface of each lens closest to the object side is called the object-side surface of the lens, and the surface of each lens closest to the image side is called the image-side surface of the lens.

[0047] It should also be understood that the terms “comprising,” “including,” “having,” “containing,” and / or “comprising”, when used in this specification, indicate the presence of the stated features, elements, and / or components, but do not exclude the presence or addition of one or more other features, elements, components, and / or combinations thereof.

[0048] Unless otherwise specified, all terms used herein (including technical and scientific terms) shall have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains. It should also be understood that terms (e.g., those defined in common dictionaries) shall be interpreted as having the meaning consistent with their meaning in the context of the relevant art and shall not be interpreted in an idealized or overly formal sense, unless expressly so specified herein.

[0049] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0050] like Figures 2 to 5 , Figures 7 to 10 , Figures 12 to 15 as well as Figures 17 to 20As shown, the camera lens according to an exemplary embodiment of the present application may include a lens barrel and a five-lens group disposed within the lens barrel. The lens barrel has an object-side end face, an image-side end face, an outer ring face, and an inner ring face. Among them, the inner ring face is configured to be stepped and increases sequentially from the object side to the image side. The five-lens group may include a first lens, a second lens, a third lens, a fourth lens, and a fifth lens arranged in sequence from the object side to the image side along the optical axis. Among them, the fifth lens has a negative optical power, and the distance from its image side to the imaging surface of the camera lens first gradually decreases and then gradually increases in a direction perpendicular to the optical axis and away from the optical axis. Between any two adjacent lenses among the first lens to the fifth lens, there may be an air gap.

[0051] The camera lens may further include a positioning element group disposed within the lens barrel. The positioning element group may include a fourth positioning element and a fifth positioning element. The fourth positioning element is disposed on the image side of the fourth lens and contacts the image side of the fourth lens. The fifth positioning element is disposed on the image side of the fifth lens and contacts the image side of the fifth lens. Among them, the effective focal length f5 of the fifth lens, the central thickness CT5 of the fifth lens on the optical axis, and the interval EP45 of the fourth positioning element and the fifth positioning element along the optical axis may satisfy: -30.0 < f5 / (EP45 - CT5) ≤ -5.0. By controlling the effective focal length of the fifth lens and the central thickness of the fifth lens on the optical axis, and at the same time coordinating the control of the interval of the fourth positioning element and the fifth positioning element along the optical axis, it is possible to maximize the adjustment of the field peak and the field curvature of the outer field, effectively control the aberration of the front optical lens of the camera lens, so that the camera lens has good coma performance, and on the premise that the camera lens meets the aberration design, the assembly stability and imaging quality of the camera lens can also be improved.

[0052] In other examples, the positioning element group may further include a first positioning element, a second positioning element, and a third positioning element. Among them, the first positioning element is disposed on the image side of the first lens and contacts the image side of the first lens. The second positioning element is disposed on the image side of the second lens and contacts the image side of the second lens. The third positioning element is disposed on the image side of the third lens and contacts the image side of the third lens. Reasonable use of positioning elements can effectively avoid the risk of stray light, reduce the interference to the image quality, and thus improve the imaging quality of the camera lens.

[0053] In the exemplary embodiment, the first lens and the fourth lens have positive optical powers, and the second lens has a negative optical power. By reasonably distributing the optical powers of the lenses, it is possible to ensure that the camera lens has a large total effective focal length on the basis of having a small optical overall length.

[0054] In an exemplary embodiment, the camera lens further satisfies: |f3| > |fn|, |f2| > |fn|, where n = 1, 4 or 5. Here, f2 is the effective focal length of the second lens, f3 is the effective focal length of the third lens, and fn is the effective focal length of the nth lens. By controlling the effective focal lengths of the second lens and the third lens to be greater than those of other lenses, it is ensured that the second lens and the third lens have a large light deflection ability.

[0055] In an exemplary embodiment, the central thickness CT5 of the fifth lens on the optical axis, the interval EP45 between the fourth positioning element and the fifth positioning element along the optical axis, the inner diameter d4s of the object side of the fourth positioning element, and the inner diameter d5m of the image side of the fifth positioning element may satisfy: 1.5 ≤ (EP45 / CT5) × (d5m / d4s) < 6.5. By controlling the inner diameters of the fourth positioning element and the fifth positioning element, the imaging quality of light when passing through the fifth lens can be effectively controlled, the off-axis aberration can be corrected, thereby improving the overall imaging quality of the camera lens. At the same time, by controlling the interval between the fourth positioning element and the fifth positioning element along the optical axis and the central thickness of the fifth lens on the optical axis, the assembly stability of the camera lens is improved.

[0056] In an exemplary embodiment, the curvature radius R9 of the object side of the fifth lens, the curvature radius R10 of the image side of the fifth lens, the inner diameter d4s of the object side of the fourth positioning element, and the inner diameter d5s of the object side of the fifth positioning element may satisfy: 0.5 < d4s / R9 + d5s / R10 < 8.5. By controlling the curvature radii of the object side and the image side of the fifth lens, it is beneficial to control the imaging quality of light when passing through the fifth lens, make the light angle of the edge field of view within a reasonable range, effectively reduce the sensitivity of the camera lens. At the same time, by controlling the inner diameters of the object sides of the fourth positioning element and the fifth positioning element, it helps to correct the off-axis aberration, thereby improving the overall imaging quality of the camera lens.

[0057] In an exemplary embodiment, the curvature radius R8 of the image side of the fourth lens, the central thickness CT4 of the fourth lens on the optical axis, the air interval T34 between the third lens and the fourth lens on the optical axis, and the interval EP34 between the third positioning element and the fourth positioning element along the optical axis may satisfy: -40.0 < R8 / (T34 + CT4 - EP34) < -3.5. By controlling the curvature radius and the central thickness of the fourth lens, it helps to control the depth of field of the camera lens to meet the requirements of optical performance. At the same time, by controlling the air interval between the third lens and the fourth lens on the optical axis and the interval between the third positioning element and the fourth positioning element along the optical axis, the field curvature of the outer field of view can be adjusted, the off-axis aberration can be corrected, thereby improving the assembly stability and imaging quality of the camera lens.

[0058] In an exemplary embodiment, the effective focal length f4 of the fourth lens, the effective focal length f5 of the fifth lens, the interval EP34 along the optical axis between the third positioning element and the fourth positioning element, the maximum thickness CP4 of the fourth positioning element, and the interval EP45 along the optical axis between the fourth positioning element and the fifth positioning element may satisfy: 1.0 ≤ (f4 + f5) / (EP34 + CP4 + EP45) ≤ 2.0. By controlling the effective focal lengths of the fourth lens and the fifth lens, a sufficient amount of light can pass through the fourth positioning element and the fifth positioning element, ensuring the light input amount of the camera lens and increasing the relative illuminance of the outer field of view, which is beneficial for correcting off-axis aberration and thus improving the imaging quality of the camera lens. While making the camera lens meet certain optical performance requirements, by reducing the thickness of the fourth positioning element, the internal structure of the camera lens is made more compact.

[0059] In an exemplary embodiment, the aperture number Fno of the camera lens, the inner diameter d3s of the object side surface of the third positioning element, the inner diameter d3m of the image side surface of the third positioning element, and the outer diameter D3m of the image side surface of the third positioning element may satisfy: 0.5 < Fno × ((D3m - d3m) / d3s) ≤ 3.0. The offset of the third positioning element during the assembly process directly affects the grating size of the camera lens. By restricting the inner and outer diameters of the third positioning element, the aperture number Fno of the camera lens can be effectively ensured to be within a reasonable range.

[0060] In an exemplary embodiment, the effective focal length f2 of the second lens, the air interval T23 between the second lens and the third lens on the optical axis, the interval EP12 along the optical axis between the first positioning element and the second positioning element, and the maximum thickness CP2 of the second positioning element may satisfy: -150.0 < f2 / (EP12 + CP2 - T23) < -40.0. By controlling the interval along the optical axis between the first positioning element and the second positioning element and the maximum thickness of the second positioning element, it is possible to balance lens aberration while ensuring the light transmission amount, avoid stray light generated by the edge structure of the effective diameter of the camera lens, and at the same time, the imaging quality of the camera lens can be adjusted by adjusting the air interval between the second lens and the third lens on the optical axis, ensuring that the imaging of light meets the requirements.

[0061] In an exemplary embodiment, the refractive index N1 of the first lens, the curvature radius R1 of the object side surface of the first lens, the curvature radius R2 of the image side surface of the first lens, and the inner diameter d1s of the object side surface of the first positioning element may satisfy: 2.0 < N1 × (R2 - R1) / d1s < 3.5. By controlling the curvature radii of the object side surface and the image side surface of the first lens, it is beneficial to control the imaging quality of light when passing through the first lens, making the light angles in the edge field of view within a reasonable range, effectively reducing the sensitivity of the camera lens, and at the same time, by controlling the inner diameter of the object side surface of the first positioning element, it helps to correct off-axis aberration, thereby improving the overall imaging quality of the camera lens.

[0062] In an exemplary embodiment, the entrance pupil diameter EPD of the camera lens, the outer diameter D0s of the object-side end face of the lens barrel, and the inner diameter d1s of the object-side face of the first positioning element may satisfy: 1.0 < (D0s - d1s) / EPD < 3.0. By controlling the inner diameter of the object-side face of the first positioning element and the outer diameter of the object-side end face of the lens barrel, the light incident amount can be effectively guaranteed, the overall image quality of the camera lens can be improved. At the same time, by cooperating with the control of the entrance pupil diameter of the camera lens, the camera lens has a sufficient aperture to obtain the required depth of field and illuminance.

[0063] In an exemplary embodiment, the effective focal length f1 of the first lens, the inner diameter d1s of the object-side face of the first positioning element, and the outer diameter D1s of the object-side face of the first positioning element may satisfy: 1.0 ≤ f1 / (D1s - d1s) ≤ 5.0. By controlling the inner and outer diameters of the object-side face of the first positioning element, the effective focal length of the first lens can be stabilized within a certain range, so that the camera lens has a certain accuracy during the assembly process, reducing the error of the lens-to-lens center axis distance, and improving the imaging quality of the camera lens.

[0064] In an exemplary embodiment, the on-axis distance Td from the object-side face of the first lens to the image-side face of the fifth lens, the inner diameter d0m of the image-side end face of the lens barrel, the inner diameter d1s of the object-side face of the first positioning element, and the interval EP01 between the object-side end face of the lens barrel and the first positioning element along the optical axis may satisfy: 1.5 ≤ (d0m - d1s) / (Td - EP01) < 2.5. By controlling the mutual relationship among the on-axis distance from the object-side face of the first lens to the image-side face of the fifth lens, the inner diameter of the image-side end face of the lens barrel, the inner diameter of the object-side face of the first positioning element, and the interval between the object-side end face of the lens barrel and the first positioning element along the optical axis, while ensuring that the incident light passing amount of the camera lens meets the requirements and the camera lens has sufficient adjustable space, the on-axis distance from the object-side face of the first lens to the image-side face of the fifth lens can be restricted, ensuring the molding and assembly stability of each lens during the assembly process, and making the lens structure compact.

[0065] In an exemplary embodiment, the total effective focal length f of the camera lens, the on-axis distance Td from the object-side face of the first lens to the image-side face of the fifth lens, and the inner diameter d0m of the image-side end face of the lens barrel may satisfy: 1.3 < f×(Td / d0m) ≤ 2.0. By controlling the mutual relationship among the total effective focal length of the camera lens, the on-axis distance from the object-side face of the first lens to the image-side face of the fifth lens, and the inner diameter of the image-side end face of the lens barrel, the molding and assembly appearance of each lens can be guaranteed, so that the camera lens can meet the performance requirements within a certain total effective focal length, and ensure the stability of the five-piece lens group in the lens barrel. <l

[0066] In an exemplary embodiment, the camera lens may further satisfy: 0 < R2i / dis < 11, where i = 1, 2, 3, or 5. When i = 1, R2i represents the radius of curvature of the image side of the first lens, and dis represents the inner diameter of the object side of the first positioning element; when i = 2, R2i represents the radius of curvature of the image side of the second lens, and dis represents the inner diameter of the object side of the second positioning element; when i = 3, R2i represents the radius of curvature of the image side of the third lens, and dis represents the inner diameter of the object side of the third positioning element; when i = 5, R2i represents the radius of curvature of the image side of the fifth lens, and dis represents the inner diameter of the object side of the fifth positioning element. The image sides of the first lens to the third lens and the fifth lens are concave surfaces. By controlling the ratio of the radius of curvature of the image side of the lens with a concave image side to the inner diameter of the object side of the positioning element at that lens, the light transmission amount of the camera lens can be ensured to meet the optical requirements, and the adjustability of these lenses in structure can be ensured to match camera lenses of different sizes. Additionally, the rotation angle of the edge field surface can be controlled to reduce the sensitivity of the camera lens. By using the above positioning elements, the excess light in the blocked imaging light can be avoided while preventing the generation of stray light ghosts.

[0067] In an exemplary embodiment, the camera lens further includes an aperture, and the aperture can be disposed between the object side and the first lens.

[0068] The camera lens according to the above embodiment of the present application may employ five lenses and multiple positioning elements. By reasonably allocating the parameters of each lens and each positioning element, the sensitivity of the camera lens can be reduced, the stray light phenomenon of the camera lens can be improved, and the assembly stability and imaging quality of the camera lens can be enhanced.

[0069] In an embodiment of the present application, at least one of the lens surfaces of each of the first lens to the fifth lens is an aspherical lens surface. The characteristics of an aspherical lens are that the curvature continuously changes from the center of the lens to the periphery of the lens. Different from a spherical lens with a constant curvature from the center of the lens to the periphery of the lens, an aspherical lens has better radius of curvature characteristics and has the advantages of improving distortion aberration and astigmatism aberration. After using an aspherical lens, the aberration that appears during imaging can be eliminated as much as possible, thereby improving the imaging quality. Optionally, both the object side and the image side of each of the first lens to the fifth lens are aspherical lens surfaces.

[0070] However, those skilled in the art should understand that without departing from the technical solutions claimed in the present application, the number of lenses and positioning elements constituting the camera lens can be changed to obtain the various results and advantages described in this specification.

[0071] The following further describes specific embodiments of the camera lens applicable to the above embodiments with reference to the accompanying drawings.

[0072] First Implementation Method

[0073] The following is for reference Figures 2 to 6D A camera lens according to a first embodiment of this application is described. Figure 2 A schematic diagram of the structure of a five-element lens group of a camera lens according to a first embodiment of this application is shown; Figures 3 to 5 Overall schematic diagrams of the camera lens 110 of Embodiment 1, the camera lens 120 of Embodiment 2, and the camera lens 130 of Embodiment 3 according to the first embodiment of this application are shown respectively.

[0074] like Figures 2 to 5 As shown, camera lenses 110, 120, and 130 each include a lens barrel P0 and a five-element lens group and a positioning element group housed within the lens barrel P0. The five-element lens group, from the object side to the image side, includes: a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, and a fifth lens E5. An aperture stop STO can be positioned between the object side and the first lens E1 as needed. The positioning element group includes: a first positioning element P1, a second positioning element P2, a third positioning element P3, a fourth positioning element P4, and a fifth positioning element P5. The positioning elements prevent excess light from entering the next lens during the imaging process, allowing the lens to better contact the lens barrel P0 and enhancing the structural stability of the camera lens.

[0075] The first lens E1 has positive optical power, with its object-side surface S1 being convex and its image-side surface S2 being concave. The second lens E2 has negative optical power, with its object-side surface S3 being convex and its image-side surface S4 being concave. The third lens E3 has positive optical power, with its object-side surface S5 being concave and its image-side surface S6 being convex. The fourth lens E4 has positive optical power, with its object-side surface S7 being convex and its image-side surface S8 being convex. The fifth lens E5 has negative optical power, with its object-side surface S9 being convex and its image-side surface S10 being concave. The filter E6 has an object-side surface S11 and an image-side surface S12. Light from the object passes sequentially through each surface S1 to S12 and finally forms an image on the imaging surface S13.

[0076] Table 1 shows the basic parameters of the camera lens of the first embodiment, wherein the units of radius of curvature, thickness / distance and focal length are all millimeters (mm).

[0077]

[0078] Table 1

[0079] In this embodiment, the total effective focal length f of the camera lens is 3.13 mm, and the aperture number FNO of the camera lens is 2.03.

[0080] In the first embodiment, the object-side surface and image-side surface of any one of the first lens E1 to the fifth lens E5 are aspherical, and the surface shape of each aspherical lens is... The following aspherical formulas can be used for limitation:

[0081] (1)

[0082] in, For an aspherical surface along the optical axis at a height of h When the position is such that the distance from the vertex of the non-spherical surface is the sag; c For the paraxial curvature of an aspherical surface, c =1 / R (i.e., paraxial curvature) c (The reciprocal of the radius of curvature R in Table 1 above). k The conic coefficient; Ai Is it an aspherical first i -th order correction coefficients. Table 2 gives the higher-order coefficients of the aspherical mirrors S1-S10 that can be used in the first embodiment. A 4 , A 6 , A 8 , A 10 , A 12 , A 14 , A 16 , A 18 and A 20 .

[0083]

[0084] Table 2

[0085] The differences between the camera lenses 110, 120, and 130 in embodiments 1, 2, and 3 of the first embodiment lie in the different structural dimensions of the included lens barrel P0 and positioning elements. Table 3 lists some parameters of the lens barrel P0 and positioning elements of the camera lenses 110, 120, and 130 of the first embodiment, such as d1s, D1s, d3s, d3m, D3m, d4s, d5s, d5m, d0m, D0s, EP01, EP12, CP2, EP34, CP4, EP45, and d2s, etc. Some of the parameters listed in Table 3 are based on... Figure 1 The measurements were obtained using the annotation method shown. The units of the parameters listed in Table 3 are all millimeters (mm).

[0086]

[0087] Table 3

[0088] Figure 6A The on-axis chromatic aberration curve of the camera lens of the first embodiment is shown, which represents the deviation of the focal point of light of different wavelengths after passing through the camera lens. Figure 6B The astigmatism curve of the camera lens of the first embodiment is shown, which represents the meridional image plane curvature and sagittal image plane curvature corresponding to different image heights. Figure 6C The distortion curve of the camera lens of the first embodiment is shown, which represents the distortion magnitude value corresponding to different image heights. Figure 6D The magnification chromatic aberration curve of the camera lens of the first embodiment is shown, which represents the deviation of different image heights on the imaging plane after light passes through the system. According to Figures 6A to 6D It can be seen that the camera lens can achieve good image quality.

[0089] Second Implementation Method

[0090] The following is for reference Figures 7 to 11D A camera lens according to a second embodiment of this application is described. Figure 7 A schematic diagram of the structure of a five-element lens group of a camera lens according to a second embodiment of this application is shown; Figure 8 , Figure 9 , Figure 10 Overall schematic diagrams of the camera lens 210 of Embodiment 1, the camera lens 220 of Embodiment 2, and the camera lens 230 of Embodiment 3 according to the second embodiment of this application are shown respectively.

[0091] like Figures 7 to 10 As shown, camera lenses 210, 220, and 230 all include a lens barrel P0 and a five-element lens group and a positioning element group housed within the lens barrel P0. The five-element lens group, from the object side to the image side, includes: a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, and a fifth lens E5. An aperture stop STO can be positioned between the object side and the first lens E1 as needed. The positioning element group includes: a first positioning element P1, a second positioning element P2, a third positioning element P3, a fourth positioning element P4, and a fifth positioning element P5. The positioning elements prevent excess light from entering the next lens during the imaging process, allowing the lens to better contact the lens barrel P0 and enhancing the structural stability of the camera lens.

[0092] The first lens E1 has positive optical power, with its object-side surface S1 being convex and its image-side surface S2 being concave. The second lens E2 has negative optical power, with its object-side surface S3 being convex and its image-side surface S4 being concave. The third lens E3 has positive optical power, with its object-side surface S5 being convex and its image-side surface S6 being concave. The fourth lens E4 has positive optical power, with its object-side surface S7 being convex and its image-side surface S8 being convex. The fifth lens E5 has negative optical power, with its object-side surface S9 being concave and its image-side surface S10 being concave. The filter E6 has an object-side surface S11 and an image-side surface S12. Light from the object passes sequentially through each surface S1 to S12 and finally forms an image on the imaging surface S13.

[0093] Table 4 shows the basic parameters of the camera lens in the second embodiment, where the units for radius of curvature, thickness / distance, and focal length are all millimeters (mm).

[0094]

[0095] Table 4

[0096] In this embodiment, the total effective focal length f of the camera lens is 3.13 mm, and the aperture number FNO of the camera lens is 2.13.

[0097] In the second embodiment, the object-side surface and image-side surface of any one of the first lens E1 to the fifth lens E5 are aspherical. Table 5 shows the higher-order coefficients of each aspherical mirror S1-S10 that can be used in the second embodiment. A 4 , A 6 , A 8 , A 10 , A 12 , A 14 , A 16 , A 18 and A 20 .

[0098]

[0099] Table 5

[0100] The difference between the camera lenses 210, 220, and 230 in embodiments 1, 2, and 3 of the second embodiment lies in the different structural dimensions of the included lens barrel P0 and positioning elements. Table 6 lists some parameters of the lens barrel P0 and positioning elements of the camera lenses 210, 220, and 230 of the second embodiment, such as d1s, D1s, d3s, d3m, D3m, d4s, d5s, d5m, d0m, D0s, EP01, EP12, CP2, EP34, CP4, EP45, and d2s, etc. Some of the parameters listed in Table 6 are based on... Figure 1 The parameters listed in Table 6 are measured using the annotation method shown. All parameters are in millimeters (mm).

[0101]

[0102] Table 6

[0103] Figure 11A The on-axis chromatic aberration curve of the camera lens of the second embodiment is shown, which represents the deflection of the focal point of light of different wavelengths after passing through the camera lens. Figure 11B The astigmatism curve of the camera lens of the second embodiment is shown, which represents the meridional image plane curvature and sagittal image plane curvature corresponding to different image heights. Figure 11C The distortion curve of the camera lens in the second embodiment is shown, which represents the distortion magnitude value corresponding to different image heights. Figure 11D The magnification chromatic aberration curve of the camera lens of the second embodiment is shown, which represents the deviation of different image heights on the imaging plane after light passes through the system. According to Figures 11A to 11D It can be seen that the camera lens can achieve good image quality.

[0104] Third Implementation Method

[0105] The following is for reference Figures 12 to 16D Describes a camera lens according to a third embodiment of this application. Figure 12 A schematic diagram of the structure of a five-element lens group of a camera lens according to a third embodiment of this application is shown; Figure 13 , Figure 14 , Figure 15 Overall schematic diagrams of the camera lens 310 of Embodiment 1, the camera lens 320 of Embodiment 2, and the camera lens 330 of Embodiment 3 according to the third embodiment of this application are shown respectively.

[0106] like Figures 12 to 15As shown, camera lenses 310, 320, and 330 all include a lens barrel P0 and a five-element lens group and a positioning element group housed within the lens barrel P0. The five-element lens group, from the object side to the image side, includes: a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, and a fifth lens E5. An aperture stop STO can be positioned between the object side and the first lens E1 as needed. The positioning element group includes: a first positioning element P1, a second positioning element P2, a third positioning element P3, a fourth positioning element P4, and a fifth positioning element P5. The positioning elements prevent excess light from entering the next lens during the imaging process, allowing the lens to better contact the lens barrel P0 and enhancing the structural stability of the camera lens.

[0107] The first lens E1 has positive optical power, with its object-side surface S1 being convex and its image-side surface S2 being concave. The second lens E2 has negative optical power, with its object-side surface S3 being concave and its image-side surface S4 being concave. The third lens E3 has positive optical power, with its object-side surface S5 being convex and its image-side surface S6 being convex. The fourth lens E4 has positive optical power, with its object-side surface S7 being convex and its image-side surface S8 being convex. The fifth lens E5 has negative optical power, with its object-side surface S9 being convex and its image-side surface S10 being concave. The filter E6 has an object-side surface S11 and an image-side surface S12. Light from the object passes sequentially through each surface S1 to S12 and finally forms an image on the imaging surface S13.

[0108] Table 7 shows the basic parameters of the camera lens in the third embodiment, where the units for radius of curvature, thickness / distance, and focal length are all millimeters (mm).

[0109]

[0110] Table 7

[0111] In this embodiment, the total effective focal length f of the camera lens is 3.11 mm, and the aperture number FNO of the camera lens is 2.00.

[0112] In the third embodiment, the object-side surface and image-side surface of any one of the first lens E1 to the fifth lens E5 are aspherical. Table 8 shows the higher-order coefficients of each aspherical mirror S1-S10 that can be used in the third embodiment. A 4 , A 6 , A 8 , A 10 , A 12 , A 14 , A 16 , A18 and A 20 .

[0113]

[0114] Table 8

[0115] The difference between the camera lenses 310, 320, and 330 in embodiments 1, 2, and 3 of the third embodiment lies in the different structural dimensions of the included lens barrel P0 and positioning element. Table 9 lists some parameters of the lens barrel P0 and positioning element of the camera lenses 310, 320, and 330 of the third embodiment, such as d1s, D1s, d3s, d3m, D3m, d4s, d5s, d5m, d0m, D0s, EP01, EP12, CP2, EP34, CP4, EP45, and d2s, etc. Some of the parameters listed in Table 9 are based on... Figure 1 The measurements were obtained using the annotation method shown. The units of the parameters listed in Table 9 are all millimeters (mm).

[0116]

[0117] Table 9

[0118] Figure 16A The on-axis chromatic aberration curve of the camera lens of the third embodiment is shown, which represents the deviation of the focal point of light of different wavelengths after passing through the camera lens. Figure 16B The astigmatism curve of the camera lens of the third embodiment is shown, which represents the meridional image plane curvature and sagittal image plane curvature corresponding to different image heights. Figure 16C The distortion curve of the camera lens in the third embodiment is shown, which represents the distortion magnitude value corresponding to different image heights. Figure 16D The magnification chromatic aberration curve of the camera lens in the third embodiment is shown, which represents the deviation of different image heights on the imaging plane after light passes through the system. According to... Figures 16A to 16D It can be seen that the camera lens can achieve good image quality.

[0119] Fourth Implementation Method

[0120] The following is for reference Figures 17 to 21D A camera lens according to a fourth embodiment of this application is described. Figure 17 A schematic diagram of the structure of a five-element lens group of a camera lens according to the fourth embodiment of this application is shown; Figure 18 , Figure 19 , Figure 20 Overall schematic diagrams of the camera lens 410 of Embodiment 1, the camera lens 420 of Embodiment 2, and the camera lens 430 of Embodiment 3 according to the fourth embodiment of this application are shown respectively.

[0121] like Figures 17 to 20 As shown, camera lenses 410, 420, and 430 all include a lens barrel P0 and a five-element lens group and a positioning element group housed within the lens barrel P0. The five-element lens group, from the object side to the image side, includes: a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, and a fifth lens E5. An aperture stop STO can be positioned between the object side and the first lens E1 as needed. The positioning element group includes: a first positioning element P1, a second positioning element P2, a third positioning element P3, a fourth positioning element P4, and a fifth positioning element P5. The positioning elements prevent excess light from entering the next lens during the imaging process, allowing the lens to better contact the lens barrel P0 and enhancing the structural stability of the camera lens.

[0122] The first lens E1 has positive optical power, with its object-side surface S1 being convex and its image-side surface S2 being concave. The second lens E2 has negative optical power, with its object-side surface S3 being concave and its image-side surface S4 being concave. The third lens E3 has negative optical power, with its object-side surface S5 being convex and its image-side surface S6 being concave. The fourth lens E4 has positive optical power, with its object-side surface S7 being concave and its image-side surface S8 being convex. The fifth lens E5 has negative optical power, with its object-side surface S9 being concave and its image-side surface S10 being concave. The filter E6 has an object-side surface S11 and an image-side surface S12. Light from the object passes sequentially through each surface S1 to S12 and finally forms an image on the imaging surface S13.

[0123] Table 10 shows the basic parameters of the camera lens according to the fourth embodiment, wherein the units for radius of curvature, thickness / distance and focal length are millimeters (mm).

[0124]

[0125] Table 10

[0126] In this embodiment, the total effective focal length f of the camera lens is 3.81 mm, and the aperture number FNO of the camera lens is 2.17.

[0127] In the fourth embodiment, the object-side surface and image-side surface of any one of the first lens E1 to the fifth lens E5 are aspherical. Table 11 lists the higher-order coefficients of each aspherical mirror S1-S10 that can be used in the fourth embodiment. A 4 , A 6 , A 8 , A 10 , A 12 , A 14 , A 16 ,A 18 and A 20 .

[0128]

[0129] Table 11

[0130] The difference between the camera lenses 410, 420, and 430 in embodiments 1, 2, and 3 of the fourth embodiment lies in the different structural dimensions of the included lens barrel P0 and positioning element. Table 12 lists some parameters of the lens barrel P0 and positioning element of the camera lenses 410, 420, and 430 of the fourth embodiment, such as d1s, D1s, d3s, d3m, D3m, d4s, d5s, d5m, d0m, D0s, EP01, EP12, CP2, EP34, CP4, EP45, and d2s, etc. Some of the parameters listed in Table 12 are based on... Figure 1 The measurements were obtained using the annotation method shown. All parameters listed in Table 12 are in millimeters (mm).

[0131]

[0132] Table 12

[0133] Figure 21A The on-axis chromatic aberration curve of the camera lens of the fourth embodiment is shown, which represents the deviation of the focal point of light of different wavelengths after passing through the camera lens. Figure 21B The astigmatism curve of the camera lens of the fourth embodiment is shown, which represents the meridional image plane curvature and sagittal image plane curvature corresponding to different image heights. Figure 21C The distortion curve of the camera lens according to the fourth embodiment is shown, which represents the distortion magnitude value corresponding to different image heights. Figure 21D The magnification chromatic aberration curve of the camera lens according to the fourth embodiment is shown, which represents the deviation of different image heights on the imaging plane after light passes through the system. According to Figures 21A to 21D It can be seen that the camera lens can achieve good image quality.

[0134] In summary, the conditional expressions of each embodiment in the first to fourth embodiments satisfy the relationships shown in Table 13.

[0135]

[0136] Table 13

[0137] The above description is merely a preferred embodiment of this application and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the invention involved in this application is not limited to technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the inventive concept. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. A camera lens, characterized in that, include: The five-element lens group, along the optical axis from the object side to the image side, includes: The first lens with positive optical power has a convex object side and a concave image side. A second lens with negative optical power has a concave image-side surface; Third lens; The fourth lens has positive optical power and its image-side surface is convex. A fifth lens with negative optical power has a concave image side. The distance from the image side of the fifth lens to the imaging surface of the camera lens gradually decreases and then gradually increases in a direction perpendicular to and away from the optical axis. A positioning element group includes a third positioning element, a fourth positioning element, and a fifth positioning element. The third positioning element is positioned on and in contact with the image-side surface of the third lens. The fourth positioning element is positioned on and in contact with the image-side surface of the fourth lens. The fifth positioning element is positioned on and in contact with the image-side surface of the fifth lens. The lens barrel, the five-element lens group, and the positioning element group are placed inside the lens barrel. The number of lenses with optical power in the camera lens is five; The effective focal length f5 of the fifth lens, the center thickness CT5 of the fifth lens on the optical axis, and the interval EP45 between the fourth positioning element and the fifth positioning element along the optical axis satisfy: -26.62≤f5 / (EP45-CT5)≤-5.05; The effective focal length f4 of the fourth lens, the effective focal length f5 of the fifth lens, the distance EP34 between the third and fourth positioning elements along the optical axis, the maximum thickness CP4 of the fourth positioning element, and the distance EP45 between the fourth and fifth positioning elements along the optical axis satisfy: 1.09≤(f4+f5) / (EP34+CP4+EP45)≤1.

91.

2. The camera lens according to claim 1, characterized in that, The center thickness CT5 of the fifth lens on the optical axis, the spacing EP45 between the fourth and fifth positioning elements along the optical axis, the inner diameter d4s of the object side of the fourth positioning element and the inner diameter d5m of the image side of the fifth positioning element satisfy: 1.56≤(EP45 / CT5)×(d5m / d4s)≤6.

31.

3. The camera lens according to claim 1, characterized in that, The radius of curvature R9 of the object side of the fifth lens, the radius of curvature R10 of the image side of the fifth lens, the inner diameter d4s of the object side of the fourth positioning element, and the inner diameter d5s of the object side of the fifth positioning element satisfy: 0.68≤d4s / R9+d5s / R10≤8.

03.

4. The camera lens according to claim 1, characterized in that, The radius of curvature R8 of the image side of the fourth lens, the center thickness CT4 of the fourth lens on the optical axis, the air gap T34 between the third and fourth lenses on the optical axis, and the gap EP34 between the third and fourth positioning elements along the optical axis satisfy: -37.87≤R8 / (T34+CT4-EP34)≤-3.

81.

5. The camera lens according to claim 1, characterized in that, The aperture number Fno of the camera lens, the inner diameter d3s of the object side of the third positioning element, the inner diameter d3m of the image side of the third positioning element, and the outer diameter D3m of the image side of the third positioning element satisfy: 0.81≤Fno×((D3m-d3m) / d3s)≤2.

92.

6. The camera lens according to claim 1, characterized in that, The positioning element group further includes a first positioning element and a second positioning element. The first positioning element is positioned on the image-side surface of the first lens and in contact with the image-side surface of the first lens, and the second positioning element is positioned on the image-side surface of the second lens and in contact with the image-side surface of the second lens. Wherein, the effective focal length f2 of the second lens, the air gap T23 between the second lens and the third lens on the optical axis, the gap EP12 between the first positioning element and the second positioning element along the optical axis and the maximum thickness CP2 of the second positioning element satisfy: -147.14≤f2 / (EP12+CP2-T23)≤-41.

10.

7. The camera lens according to claim 6, characterized in that, The refractive index N1 of the first lens, the radius of curvature R1 of the object side surface of the first lens, the radius of curvature R2 of the image side surface of the first lens, and the inner diameter d1s of the object side surface of the first positioning element satisfy: 2.15≤N1×(R2-R1) / d1s≤3.

39.

8. The camera lens according to claim 6, characterized in that, The entrance pupil diameter EPD of the camera lens, the outer diameter D0s of the object side end face of the lens barrel, and the inner diameter d1s of the object side face of the first positioning element satisfy: 1.49≤(D0s-d1s) / EPD≤2.

53.

9. The camera lens according to claim 6, characterized in that, The effective focal length f1 of the first lens, the inner diameter d1s of the object side surface of the first positioning element, and the outer diameter D1s of the object side surface of the first positioning element satisfy: 1.0 < f1 / (D1s-d1s) ≤ 5.

0.

10. The camera lens according to claim 6, characterized in that, The axial distance Td between the object side surface of the first lens and the image side surface of the fifth lens, the inner diameter d0m of the image side end face of the lens barrel, the inner diameter d1s of the object side surface of the first positioning element, and the distance EP01 between the object side end face of the lens barrel and the first positioning element along the optical axis satisfy: 1.67≤(d0m-d1s) / (Td-EP01)≤2.

19.

11. The camera lens according to claim 1, characterized in that, The total effective focal length f of the camera lens, the axial distance Td from the object side of the first lens to the image side of the fifth lens, and the inner diameter d0m of the image side end face of the lens barrel satisfy the following condition: 1.39mm ≤ f × ​​(Td / d0m) < 2.0mm.

12. The camera lens according to claim 1, characterized in that, The positioning element group further includes a first positioning element and a second positioning element. The first positioning element is positioned on the image-side surface of the first lens and in contact with the image-side surface of the first lens, and the second positioning element is positioned on the image-side surface of the second lens and in contact with the image-side surface of the second lens. The camera lens also satisfies: 0.16 ≤ R²i / dis ≤ 10.25, where i = 1, 2, 3, or 5. Wherein, when i is 1, R2i represents the radius of curvature of the image-side surface of the first lens, and dis represents the inner diameter of the object-side surface of the first positioning element; when i is 2, R2i represents the radius of curvature of the image-side surface of the second lens, and dis represents the inner diameter of the object-side surface of the second positioning element; when i is 3, R2i represents the radius of curvature of the image-side surface of the third lens, and dis represents the inner diameter of the object-side surface of the third positioning element; when i is 5, R2i represents the radius of curvature of the image-side surface of the fifth lens, and dis represents the inner diameter of the object-side surface of the fifth positioning element.

13. The camera lens according to any one of claims 1 to 12, characterized in that, The camera lens also satisfies: |f3|>|fn|, |f2|>|fn|, n=1, 4 or 5, where f2 is the effective focal length of the second lens, f3 is the effective focal length of the third lens, and fn is the effective focal length of the nth lens.

Images